Everyone wants to improve their diet, but it takes a lot of work to do a full overhaul. If you want to ease into it a little, here's how to substitute healthier foods for your favorite unhealthy cooking staples.

It's easy to make an otherwise healthy meal incredibly unhealthy by dousing it in one or two ingredients—like a bunch of butter or too many fatty dairy products—but it's surprisingly easy to do the opposite, too. With a few substitutions to your standard cooking routine, you can make low-fat meals without sacrificing too much taste. You don't need to cut these ingredients out entirely, but it's helpful to occasionally cut back in certain meals. Your taste bud mileage will vary a little here, but even if you do notice a difference in flavor it's usually not too much.

Use Reduced Fat Milk, Half-and-Half, or Milk Alternatives in Place of Whole Milk

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It might seem obvious that replacing whole milk with reduced fat milk cuts back on calories, but it's worth pointing out because in most cases it doesn't really affect the flavor. The difference is pretty pronounced: whole milk has around 150 calories in an 8 ounce serving, where skim milk only has 80 calories (but skim milk does still have sugar in it, so it's kind of a toss-up of which you should use and depends on the meal you're cooking and if you're just cutting calories or not, fat isn't always a bad thing). Thankfully, as TLC Cooking points out, substituting reduced fat milk products rarely affects taste:

For example, cream-based soups can be made with reduced-fat milk instead of whole milk or heavy cream. Other recipes calling for high fat milk or cream can also replace the offending ingredient with evaporated skim milk or fat-free half-and-half. It's worth it to make the effort since a mere quarter of a cup of heavy whipping cream packs more than 22 grams of fat and 205 calories per serving.

Use Half the Amount of Bolder Flavored Cheeses in Place of Mild Cheese

Just like milk, switching to a reduced-fat cheese is a simple way to cut the fat and calories from a meal without sacrificing too much flavor. That said, you can still get that cheesy flavor without ditching the full-fat cheeses entirely.

If you plan your recipes out right you can get the flavor punch you want from a full-fat cheese and only use a little bit of it. Eating Well recommends using the full-fat cheese on the top of baked dishes instead of in the middle for the biggest flavor impact. This way, you still get the flavor, but you're not eating as much of it.

Likewise, Real Living suggests simply substituting a bolder cheese (like aged cheddar, asiago, or smoked cheese) for recipes that calls for mild cheese. When you use a cheese with a stronger flavor, you only need to use about half the amount of what the recipe calls for. Photo by Justin Cozart.

Use Applesauce or Oils Instead of Butter

Butter is one of the catch-all staples of the kitchen that's used for everything from frying to baking. While it tastes great, it's also high in calories and saturated fats. Butter likely isn't as bad for you as you might think (and is actually good as long as you don't use it for everything), but you don't need to use butter all the time. A ton of different substitutes exist depending on the context of your butter needs.

The most obvious butter replacement is oil. For recipes that call for you to "butter a pan," a fat-free non-stick cooking spray works just as well. For frying (and even boiling), olive oil and canola oil make great substitutes. While both oils have about the same amount of calories as butter, they have fewer saturated fats. The conversion is pretty simple too. You'll likely notice a little bit of a difference in the flavor of the final meal, but it's not as pronounced as you'd think. An even closer replacement is coconut oil. While coconut oil is still a blend of fatty acids, it a little better than butter, and is easy to cook with even at high temperatures.

For those cakes that require butter, a common (and odd) substitute is applesauce. Fitsugar recommends replacing butter with half the amount of applesauce. So, if a recipe calls for a cup of butter, use half a cup of butter and half a cup of applesauce. You can replace all the butter if you want, but you'll get a sweeter taste. If applesauce isn't your thing, you can do the same substitution with greek yogurt. It sounds a little weird, but with baking you likely won't notice the substitution too much. Photo by Veganbaking.net.

Using herbs, spices, and other flavorings is a great way to season food... Experiment with fresh or dried garlic, oregano, pepper, sage, rosemary, or tarragon; bolder seasonings such as curry, cinnamon, nutmeg, saffron, or smoked paprika; tangy marinades, such as lemon juice, lime juice, or flavored vinegars; or fragrant oils, such as sesame oil, walnut oil, extra virgin olive oil, or pumpkin seed oil.

Essentially, salt is boring anyway, so you might as well use something that's probably healthier and tastes better. It's also good to keep in mind the idea that "salt to taste" is a little more complicated than it sounds, and you can't simply substitute table salt for kosher salt willy nilly (you have to halve the measurement). In short, you might be overusing salt and it's easy to cut back.

However, if you're baking, salt is incredibly important for creating a stable texture in baked goods, so don't go cutting back too much there.

Mix Whole Wheat Flour with White Flour

White flour often gets a bad rap because it's so often associated with the (overly) demonized white bread. White flour just isn't as beneficial as wheat flour because white flour (and white bread) is typically refined and stripped of nutrients and fiber. That means you're just getting empty calories and sugars.

The solution here isn't as cut and dry as you'd think though. Whole wheat flour tastes significantly different than white flour, and you will absolutely notice a difference if you bake with it. The best thing to do is to substitute whole wheat flour for half the recipe. This adds in that vital fiber and other nutrients without significantly altering the taste. If you like, The Kitchn has tips for using whole wheat flours with a number of meals.

Use Yogurt Instead of Sour Cream or Mayonnaise

Being from a Polish family, I have a special affinity for dishes that have a lot of sour cream in them. Sour cream isn't that unhealthy when used in moderation, but, let's be honest, most Polish dishes don't use sour cream in moderation at all. That means in a lot of meals you're getting a ton of fat and calories. Thankfully, for a number of meals, plain yogurt makes a great sour cream substitute.

You might still need a full-blown overhaul of your diet and eating habits. Once you get your diet in gear, you can add a few more healthy ingredients into the mix to keep it going. But the above substitutions can make the meals you already love a little more fat-free without killing off the taste. By no means do you need to make substitutions for every single meal because fat is an important part of a healthy diet, but you want to choose the best fats possible. You'll need to experiment with different substitutes for different recipes (they're not going to work all the time), but it's a surprisingly easy to cut down on fat and calories in your meals.